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Goodwill and Intangibles (Tables) | 6 Months Ended
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Jun. 30, 2026
Intangible Asset, Goodwill and Other [Abstract] |
Schedule of Changes in Carrying Amount of Goodwill | The following table summarizes the carrying amount and changes in goodwill associated with the Company’s segments:
(in thousands) | GCR |  | ODR |  | Total
Goodwill as of December 31, 2025 | $ | 15,578 |  |  | $ | 55,022 |  |  | $ | 70,600 |
Measurement period adjustments - Pioneer Power Transaction(1) | — |  |  | 2,044 |  |  | 2,044 |
Goodwill as of June 30, 2026 | $ | 15,578 |  |  | $ | 57,066 |  |  | $ | 72,644 |
(1) The Company recorded cumulative measurement period adjustments during the six months ended June 30, 2026 primarily related to refinements of acquired working capital balances, including accounts payable, accrued expenses and other current liabilities, and contract liabilities, based on additional information regarding facts and circumstances that existed as of the acquisition date. The net effect of these adjustments was recorded as a corresponding adjustment to goodwill. See Note 3 – Acquisitions for further detail.
Schedule of Definite-Lived and Indefinite-Lived Intangible Assets | Intangible assets are comprised of the following:
(in thousands) | Gross carrying amount |  | Accumulated amortization |  | Net intangible assets, excluding goodwill
June 30, 2026 |  |  |  |  |
Amortized intangible assets: |  |  |  |  |
Customer relationships | $ | 47,620 |  |  | $ | (14,384) |  |  | $ | 33,236 |
Backlog | 5,960 |  |  | (5,960) |  |  | — |
Trade name, trademarks and intellectual property | 5,550 |  |  | (2,970) |  |  | 2,580 |
Total amortized intangible assets | 59,130 |  |  | (23,314) |  |  | 35,816 |
Unamortized intangible assets: |  |  |  |  |
Trade name – Limbach(1) | 9,960 |  |  | — |  |  | 9,960 |
Total unamortized intangible assets | 9,960 |  |  | — |  |  | 9,960 |
Total amortized and unamortized assets, excluding goodwill | $ | 69,090 |  |  | $ | (23,314) |  |  | $ | 45,776 |
(1) The Company has determined that its trade name has an indefinite useful life. The Limbach trade name has been in existence since the Company’s founding in 1901 and therefore is an established brand within the industry.
(in thousands) | Gross carrying amount |  | Accumulated amortization |  | Net intangible assets, excluding goodwill
December 31, 2025 |  |  |  |  |
Amortized intangible assets: |  |  |  |  |
Customer relationships | $ | 47,620 |  |  | $ | (11,741) |  |  | $ | 35,879 |
Backlog | 5,960 |  |  | (5,800) |  |  | 160 |
Trade name, trademarks and intellectual property | 5,550 |  |  | (2,362) |  |  | 3,188 |
Total amortized intangible assets | 59,130 |  |  | (19,903) |  |  | 39,227 |
Unamortized intangible assets: |  |  |  |  |
Trade name – Limbach | 9,960 |  |  | — |  |  | 9,960 |
Total unamortized intangible assets | 9,960 |  |  | — |  |  | 9,960 |
Total amortized and unamortized assets, excluding goodwill | $ | 69,090 |  |  | $ | (19,903) |  |  | $ | 49,187 |

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